Spot Booker DeWitt to win a Bioshock Infinite Special Edition

Dotted around indie retailers here in the UK are Booker DeWitt wanted posters. Find one, tweet it using the hash-tag #BioShockInfinite, and you could win the limited edition version of the game. So where are these posters? Fortunately 2K has released a city location list which should help you on your way, assuming you know where your indie retailer is located.